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Low Rank based dynamic PET image reestablishment method

An image reconstruction and dynamic technology, applied in the field of PET imaging, which can solve the problems of low resolution and noise interference.

Inactive Publication Date: 2014-09-24
ZHEJIANG UNIV
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Problems solved by technology

[0005] Aiming at the above-mentioned technical problems existing in the prior art, the present invention provides a dynamic PET image reconstruction method based on Low Rank, which solves the problems of low resolution and noise interference generated by the computer in the process of image reconstruction

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  • Low Rank based dynamic PET image reestablishment method
  • Low Rank based dynamic PET image reestablishment method
  • Low Rank based dynamic PET image reestablishment method

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Embodiment Construction

[0042] In order to describe the present invention more specifically, the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0043] Such as figure 1 Shown, a kind of dynamic PET image reconstruction method based on Low Rank, comprises steps:

[0044] The positron emission tomography scanner detects the radioactive signals emitted from the human body, and after processing by the coincidence and acquisition system, the original projection line is formed and stored in the computer hard disk in the form of a sinogram; for the originally collected sinogram, the sinogram and known The system matrix D of is the input item, and the relevant modules are called.

[0045] S1. Establish the basic model of the reconstruction problem according to the principle of PET detection;

[0046] S2. Introducing Low-Rank to optimize the problem model;

[0047] S3. Initialization, setting the initia...

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Abstract

The invention discloses a Low Rank based dynamic PET image reestablishment method. The Low Rank based dynamic PET image reestablishment method reestablishes a PET image by establishing a mathematical model of the reestablishment problem and converting an equivalence problem model based on a Low Rank method. When the Low Rank model is utilized to perform PET image reestablishment, the equivalence problem model adopts an alternating minimization algorithm in the solving process. Therefore, the Low Rank based dynamic PET image reestablishment method effectively utilizes the Low Rank method and solves the problems including low resolution and noise interference of results produced in the dynamic PET image reestablishment process of a computer. Compared with experiments of existing reestablishment methods, the Low Rank based dynamic PET image reestablishment method can obtain good reestablishment effect.

Description

technical field [0001] The invention belongs to the technical field of PET imaging, and in particular relates to a Low Rank (Low Rank)-based dynamic PET image reconstruction method. Background technique [0002] Positron emission tomography (PET) is a medical imaging technology based on nuclear physics and molecular biology. in accordance with. When performing PET scanning, it is first necessary to inject drugs labeled with radioactive isotopes into the human body. Through the blood circulation system, these substances will form a certain distribution in various tissues and organs in the human body. Because the radioactive isotope is unstable, it will decay, and the positrons generated during the decay will annihilate with the electrons in the tissue, producing a pair of gamma photons with almost opposite directions. Pairs of photons that distribute information are processed to generate projection data. The spatial concentration distribution of radioactive substances can ...

Claims

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Application Information

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IPC IPC(8): G06T11/00
Inventor 刘华锋王陈也陈舒杭
Owner ZHEJIANG UNIV
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